<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
			 	<div class="title border-topbottom">当前城市</div>
			 	<div class="button-list">
			 		<div class="button-wrapper">
			 			<div class="button">
			 				<!--{{this.$store.state.city}}-->
			 				{{this.currentCity}}
			 			</div>
			 		</div>
			 	</div>
			</div>
			<div class="area">
			 	<div class="title border-topbottom">热门城市</div>
			 	<div class="button-list">
			 		<div class="button-wrapper" 
			 			v-for="item of hotCities" 
			 			:key="item.id"
			 			@click="handleCityClick(item.name)"
			 			>
			 			<div class="button">	{{item.name}}</div>
			 		</div>
			 	</div>
			</div>
			<div class="area" 
				v-for="(item,key) of cities" 
				:key="key" 
				:ref="key"
				>
			 	<div class="title border-topbottom">{{key}}</div>
			 	<div class="item-list">
			 		<div class="item border-bottom" 
			 			 v-for="city of item"
			 			 :key="item.id"
			 			 @click="handleCityClick(city.name)"
			 			 >{{city.name}}</div>
			 	</div>
			</div>
		</div>
	</div>
</template>

<script>
	import BScroll from 'better-scroll'
	
	import {mapState,mapMutations} from 'vuex'
	export default {
		name:'CityList',
		mounted(){
			this.scroll = new BScroll(this.$refs.wrapper)
		},
		props:{
			cities:Object,
			hotCities:Array,
			letter:String,
		},
//		监听 letter 变化
		watch:{
			letter(){
				console.log(this.letter)
				if(this.letter){
					const element = this.$refs[this.letter][0]
//					console.log(element)
					this.scroll.scrollToElement(element)
				}
			}
		},
		methods:{
			handleCityClick(city){
//				alert(city)
//				this.$store.dispatch('changeCity',city)	//带 action 的调用方式
//				this.$store.commit('changeCity',city)	//直接调用 commit 的调用方式
				this.changeCity(city) //简化调用方式
				
				this.$router.push('/')
			},
			...mapMutations([
				'changeCity'
			])
		},
		computed:{
			...mapState({
				currentCity:'city'
			})
		}
	}
</script>

<style lang="stylus" scoped>
@import '~style/varibles.styl'
.list {
	position: absolute;
	top: 1.64rem;
	left: 0;
	right: 0;
	bottom: 0;
	/*background: red;*/
	overflow: hidden;
}
.title {
	line-height: .54rem;
	background: #eee;
	padding-left: .2rem;
	color: #666;
	font-size:.26rem;
}

.border-topbottom {
	&:before{
		border-color: #777;
	}	
	&:after{
		border-color:#777;
	}
}
.button-list {
	padding: .1rem;
	overflow: hidden;
	padding-right: .6rem;
	.button-wrapper {
		float: left;
		width: 33.33%;
		.button {
			text-align: center;
			margin: .1rem .1rem;
			border: .02rem solid #ccc;
			padding: .1rem 0;
			border-radius: .06rem;
		}
	}
}
.item-list {
	.item {
		line-height: .76rem;
		padding-left: .2rem;
	}
	.border-bottom {
			&:before{
				border-color: #777;
		}	
	}
}


</style>